# JIS A 1128-2005

A 1128 2005 1 14 12 1 (JCI) JIS A 1128: 1999 ISO 4848:1980 Determination of air content of freshly mixed concrete Pressure method JIS A 1128 1 2 JIS A 1128 2005 2 ························································································································································································1 1. ·········································································································································································1 2. ·········································································································································································1 3. ·················································································································································································1 3.1 ······························································································································································1 3.2 ···········································································································································································3 4. ·················································································································································································3 5. ···································································································································3 5.1 ·····································································································································3 5.2 ······························································································································································3 5.3 ····················································································································4 6. ····················································································································································4 7. ···································································································································5 8. ·················································································································································································5 9. ·················································································································································································6 1 ························7 1. ·········································································································································································7 2. ·········································································································································································7 3. ·················································································································································································7 3.1 ··························································································································································7 3.2 ·········································································································································7 3.3 ··································································································································································8 3.4 ···········································································································································································8 3.5 ···········································································································································································8 3.6 ······························································································································································8 4. ·················································································································································································8 5. ···································································································································8 5.1 ·······························································································8 5.2 ·····································································································································8 5.3 ···············································································································································································8 5.4 ······································································································································································8 5.5 ·········································································································································8 5.6 P ······························································································································································9 5.7 ···································································································································10 6. ··················································································································································10 A 1128 2005 3 7. ································································································································· 11 8. ··································································································································································12 9. ···············································································································································································12 2 JIS ·····························································································13 JIS A 1128 2005 Method of test for air content of fresh concrete by pressure method 1980 1 ISO 4848:1980 Determination of air content of freshly mixed concrete Pressure method 2 1. ( 1 )( 2 ) ( 1 ) 40 mm ( 2 ) 1 1. 2. ISO/IEC Guide 21 IDT MOD NEQ ISO 4848:1980 Determination of air content of freshly mixed concrete Pressure method (MOD) 2. JIS A 1115 JIS A 1116 ( ) JIS A 1138 JIS A 8610 3. 3.1 a) 1 2 A 1128 2005 1 b) 0.75 1.25 ( ) 5 L ( ) 7 L c) ( ) d) 5 100 kPa 0.1% e) 100 kPa 1 kPa 9 cm (5.3 ) 8 (5.2 ) f) ( 50 mm 2 ) 3 A 1128 2005 2 3 3.2 JIS A 8610 4. JIS A 1115 JIS A 1138 5. 5.1 a) b) 9 c) t 1 d) m 1 1g e) m 2 1g f) G 1 1g g) w 1 2 1 C ) ( ρ G m m V + − = w t 1 5.2 a) ( 3 ) ( 3 ) ( 2 ) (5.1 ) 4 A 1128 2005 b) 5 c) 0 2 3 ( 3 ) 5.3 a) 5.2 a) 1) 3.1 f) 100 140 mL( 2 ) 2) 3) 4) b) a) a) c) 4 5 ( 2 )